COBALT CHLORIDE AND CALCIUM BROMIDE. 



203 



12th solution. Both solutions transmitted the violet with about the same 

 intensity. 



The 14th solution absorbed completely all the red as far as 0.632 /, thus 

 including the narrow band at 6405. The yellow was much less intensely 

 transmitted by the more concentrated solution than by the weaker one. A 

 change similar in kind, but not in degree, appeared in the indigo and violet. 



Only a short, comparatively faint region of yellow was transmitted by 

 the 15th solution. If it be stated that the 14th solution absorbed everything 

 visible beyond 0.632/, then the corresponding number for the 15th solution 

 must beO.619//. 



The spectrum of the less concentrated solution of the pair was much 

 brighter in the yellow than that of the more concentrated solution. 



The most concentrated solution of the series did not transmit the faintest 

 trace of orange or yellow light. Its spectrum extended from about OAQOn to 

 the ultra-violet. The intensity of violet transmitted by the 15th and 16th 

 solutions appeared the same for the two spectra. 



The freezing-point lowerings for the solutions containing both cobalt and 

 calcium chloride are given in the following table: 



TABLE 104. 



The solutions whose concentrations were between 0.189 and 1.136, inclusive 

 of the limits, had their freezing-point lowerings determined 74 days after 

 they were made up, whereas the corresponding time for each of the remaining 



